<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        const data = [
            { id: '01', name: '张大大', pid: '', job: '项目经理' },
            { id: '02', name: '小亮', pid: '01', job: '产品leader' },
            { id: '03', name: '小美', pid: '01', job: 'UIleader' },
            { id: '04', name: '老马', pid: '01', job: '技术leader' },
            { id: '05', name: '老王', pid: '01', job: '测试leader' },
            { id: '06', name: '老李', pid: '01', job: '运维leader' },
            { id: '07', name: '小丽', pid: '02', job: '产品经理' },
            { id: '08', name: '大光', pid: '02', job: '产品经理' },
            { id: '09', name: '小高', pid: '03', job: 'UI设计师' },
            { id: '10', name: '小刘', pid: '04', job: '前端工程师' },
            { id: '11', name: '小华', pid: '04', job: '后端工程师' },
            { id: '12', name: '小李', pid: '04', job: '后端工程师' },
            { id: '13', name: '小赵', pid: '05', job: '测试工程师' },
            { id: '14', name: '小强', pid: '05', job: '测试工程师' },
            { id: '15', name: '小涛', pid: '06', job: '运维工程师' }
        ]
        // list是需要遍历的扁平数组
        // rootValue顶级节点的pid
        function transTree(list, rootValue) {
            let treeData = []
            // list.forEach(item=>{
            //  if(!item.pid) treeData.push(item)
            //  let children = list.filter(data=> data.pid===item.id)
            //  if(!children.length) return
            //  item.children= children
            // })
            list.forEach(item => {
                if (item.pid === rootValue) {
                    let children = transTree(list, item.id)
                    if(children.length){
                        item.children = children
                    }
                    treeData.push(item)
                }
            })
            return treeData
        }
        const treeData = transTree(data,'')
        console.log(treeData)
    </script>
</body>

</html>